The empirical relationship between competition intensity and the rate of productivity growth across 30 sectors of the French economy between 1978 and 2015 displays an inverted U-shape. This implies that there exists an optimal level of competition for each sector, defined by the price markup...

The empirical relationship between competition intensity and the rate of productivity growth across 30 sectors of the French economy between 1978 and 2015 displays an inverted U-shape. This implies that there exists an optimal level of competition for each sector, defined by the price markup...

We consider a horizontally and vertically differentiated duopoly model in order to analyse both intra- and inter-platform competition in a fully covered broadband access market (copper-copper, copper-FTTH and FTTH-FTTH competitions). The model is purely static and does not address dynamic...